Press Releases
June 13, 2008

Alexion to Present at the William Blair 28th Annual Growth Stock Conference

CHESHIRE, Conn., June 13, 2008 /PRNewswire-FirstCall via COMTEX News Network/ -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) today announced that Vikas Sinha, Senior Vice President and Chief Financial Officer of Alexion Pharmaceuticals, will present at the William Blair 28th Annual Growth Stock Conference in Chicago at 9:10 a.m., local time (10:10 a.m., eastern) on Thursday, June 19, 2008.

An audio webcast of Mr. Sinha's remarks will be available live. You can access the webcast at: www.alexionpharm.com. An archived version of the remarks will also be available through the Company's web site for a limited time following the conference.

[ALXN-G]

SOURCE Alexion Pharmaceuticals, Inc.

http://www.alexionpharm.com

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